1. NERC Centre for Ecology and Hydrology; Benson Lane Wallingford OX10 8BB UK
2. Centre for Rural Policy Research; Department of Politics; University of Exeter; Rennes Drive Exeter EX4 4RJ UK
3. Department of Geography; Staffordshire University; Leek Rd Stoke-on-Trent ST4 2DF UK
4. School of Agriculture; Policy and Development; University of Reading; Earley Gate Reading RG6 6AR UK